It must be an IP address in the same subnet. Other than that, the network designer has the flexibility to assign any IP address in the same subnet. Quite often, the first or last IP addresses in a subnet are used, so if a certain interface on this router has IP address 10.0.5.1, and the network mask is 255.255.255.0, I would strongly suspect that the other router has IP address 10.0.5.2 (10.0.5.0 can't be used for this subnet).For serial (point-to-point) connections, to save address space, quite often a subnet /30 is used (that is, a subnet mask of 255.255.255.252), in which case the other router has the only other usable IP address in the subnet. For example, if this router has IP address 10.0.8.26 and a subnet mask 255.255.255.252, the subnet has addresses in the range 10.0.8.24 - 10.0.8.27, but since the first and last addresses can't be used, the only option for a router or other machine on the other end is 10.0.8.25.It must be an IP address in the same subnet. Other than that, the network designer has the flexibility to assign any IP address in the same subnet. Quite often, the first or last IP addresses in a subnet are used, so if a certain interface on this router has IP address 10.0.5.1, and the network mask is 255.255.255.0, I would strongly suspect that the other router has IP address 10.0.5.2 (10.0.5.0 can't be used for this subnet).For serial (point-to-point) connections, to save address space, quite often a subnet /30 is used (that is, a subnet mask of 255.255.255.252), in which case the other router has the only other usable IP address in the subnet. For example, if this router has IP address 10.0.8.26 and a subnet mask 255.255.255.252, the subnet has addresses in the range 10.0.8.24 - 10.0.8.27, but since the first and last addresses can't be used, the only option for a router or other machine on the other end is 10.0.8.25.It must be an IP address in the same subnet. Other than that, the network designer has the flexibility to assign any IP address in the same subnet. Quite often, the first or last IP addresses in a subnet are used, so if a certain interface on this router has IP address 10.0.5.1, and the network mask is 255.255.255.0, I would strongly suspect that the other router has IP address 10.0.5.2 (10.0.5.0 can't be used for this subnet).For serial (point-to-point) connections, to save address space, quite often a subnet /30 is used (that is, a subnet mask of 255.255.255.252), in which case the other router has the only other usable IP address in the subnet. For example, if this router has IP address 10.0.8.26 and a subnet mask 255.255.255.252, the subnet has addresses in the range 10.0.8.24 - 10.0.8.27, but since the first and last addresses can't be used, the only option for a router or other machine on the other end is 10.0.8.25.It must be an IP address in the same subnet. Other than that, the network designer has the flexibility to assign any IP address in the same subnet. Quite often, the first or last IP addresses in a subnet are used, so if a certain interface on this router has IP address 10.0.5.1, and the network mask is 255.255.255.0, I would strongly suspect that the other router has IP address 10.0.5.2 (10.0.5.0 can't be used for this subnet).For serial (point-to-point) connections, to save address space, quite often a subnet /30 is used (that is, a subnet mask of 255.255.255.252), in which case the other router has the only other usable IP address in the subnet. For example, if this router has IP address 10.0.8.26 and a subnet mask 255.255.255.252, the subnet has addresses in the range 10.0.8.24 - 10.0.8.27, but since the first and last addresses can't be used, the only option for a router or other machine on the other end is 10.0.8.25.
dotted decimal notation
A router running a classless routing protocol (Such as OSPF) will send the subnet mask in its route updates to its neighboring routers.
binary ANDing
172.17
It depends on whether you are subnetting or not. If not, the default subnet mask would be 255.255.255.0
With CIDR and VLSM, the subnet mask can no longer be implied. The routing protocol must include information about the subnet mask, when a router sends updates to other routers. This makes some older routing protocols unsuitable for such cases; for example, RIP version 1 is unsuitable, but RIP version 2 was changed so that it included the subnet mask.With CIDR and VLSM, the subnet mask can no longer be implied. The routing protocol must include information about the subnet mask, when a router sends updates to other routers. This makes some older routing protocols unsuitable for such cases; for example, RIP version 1 is unsuitable, but RIP version 2 was changed so that it included the subnet mask.With CIDR and VLSM, the subnet mask can no longer be implied. The routing protocol must include information about the subnet mask, when a router sends updates to other routers. This makes some older routing protocols unsuitable for such cases; for example, RIP version 1 is unsuitable, but RIP version 2 was changed so that it included the subnet mask.With CIDR and VLSM, the subnet mask can no longer be implied. The routing protocol must include information about the subnet mask, when a router sends updates to other routers. This makes some older routing protocols unsuitable for such cases; for example, RIP version 1 is unsuitable, but RIP version 2 was changed so that it included the subnet mask.
There isn't just a single subnet mask that could be used for that address. The default subnet mask would be 255.0.0.0, but there could be others if the network is subnetted.
Because each IP defines certain subnet mask.
It does not require a subnet mask.
The Method used for changing your subnet mask would be based on what platform your using and its installed operating system.
The address you gave is not an IP address; it has the appearance of a subnet mask. It could be a class A or class B subnet mask.